ETON SOLUTIONS Senior Software Developer Interview Questions and Answers

Basic 2 ,3 Java programs. Moderate level.

Q1. Core Java theory questions. Questions focused on multithreading. Basic spring boot questions.
Add your answer
Q2. How to handle authentication in Spring Boot
Ans. 
Authentication in Spring Boot is handled using Spring Security which provides various authentication mechanisms.
• Use Spring Security to configure authentication in Spring Boot

• Define a custom UserDetailsService to load user-specific data for authentication

• Use annotations like @EnableWebSecurity and @EnableGlobalMethodSecurity to secure endpoints

• Configure authentication providers like in-memory, JDBC, LDAP, etc. in the ap
Answered by AI
Add your answer
Q3. Transient keyword
Add your answer

Q1. Core Java programs. Core Java theory questions
Add your answer
Q2. How many ways in Java we can handle deadlock or ways to handle synchronisation in Java.
Ans. 
In Java, deadlock can be handled by using techniques like avoiding nested locks, using timeout, and using the java.util.concurrent package.
• Avoid nested locks to prevent potential deadlocks.

• Use timeout when acquiring locks to prevent indefinite waiting.

• Utilize java.util.concurrent package classes like ReentrantLock and Semaphore for more advanced synchronization control.
Answered by AI
Add your answer

Q1. Basic salary related questions
Add your answer

Q1. OOPS, difference between abstract class and interface, difference between response.Redirect and server.Transfer, sql transaction, procedure, functions, connected and disconnected architecture
Ans. 
Questions on OOPS concepts, SQL transactions, and web development
• Abstract class vs interface: abstract class can have implementation while interface cannot

• response.Redirect vs server.Transfer: Redirect sends a new request while Transfer does not

• SQL transaction: a set of SQL statements executed as a single unit of work

• SQL procedure: a set of SQL statements that can be called like a function

• SQL function: a set of SQL sta...read more
Answered by AI
Add your answer

Q1. Project and technology related
Add your answer

Q1. What basic JavaScript and React concepts were you asked about during the interview?
Add your answer
Q2. Closures, useMemo, useCalbback and a practical task is given that should completed within 20 minutes
Add your answer

Mostly questions on logical aptitude

Q1. DSA questions. Reverse word of string, bubble sort, swap two variables without use of third variable
Add your answer
Q2. OOPs concepts also some questions on project
Add your answer
Q3. 1 puzzle (refer gfg)
Add your answer

Q1. Why do you want to work at our company?
Add your answer
Q2. What was the toughest challenge you have ever faced?
Add your answer

Data structure and aptitude

10 mins given for prepare for the problem and after completing the problem (program ) they asked to explain and asked to upgrade the program by reduce time complexity

Q1. Topic given and want to explain
Add your answer
Q2. Reverse string without buildin funtion and for loop
Ans. 
Reverse a string without using built-in functions or for loops
• Use recursion to reverse the string

• Pass the substring excluding the first character to the recursive function

• Base case: return the character itself if the length of the string is 1

• Concatenate the last character of the string with the result of the recursive call
Answered by AI
Add your answer

Q1. Introduce your self
Ans. 
I am a passionate software developer with experience in Java, Python, and web development.
• Experienced in Java and Python programming languages

• Skilled in web development technologies like HTML, CSS, and JavaScript

• Worked on projects involving database management with SQL
Answered by AI
Add your answer
Q2. Are you ok with agreement
Ans. 
Yes, I am okay with agreement.
• I am comfortable with signing agreements related to software development projects.

• I understand the importance of agreements in protecting both parties involved in a project.

• I am willing to review and negotiate agreements to ensure they are fair and reasonable.
Answered by AI
Add your answer

Q1. Find in rotated sorted array
Ans. 
Search for a target value in a rotated sorted array.
• Use binary search to find the pivot point where the array is rotated.

• Determine which half of the array the target value lies in based on the pivot point.

• Continue binary search in the appropriate half of the array to find the target value.
Answered by AI
Add your answer
Q2. Design IMDB. how will you manage concurrent ratings
Ans. 
Design IMDB with concurrent ratings management
• Implement a locking mechanism to ensure only one user can update a rating at a time

• Use a queue system to handle multiple rating requests in an orderly manner

• Consider using distributed systems to handle high concurrency levels
Answered by AI
Add your answer

Q1. Design vehicle rental system. Api design
Ans. 
Design a vehicle rental system API
• Create endpoints for listing available vehicles, booking a vehicle, and returning a vehicle

• Include authentication and authorization mechanisms for users and admins

• Implement payment gateway integration for processing rental payments

• Include features like vehicle search, filtering, and reviews/ratings

• Consider scalability and performance optimizations for handling high traffic
Answered by AI
Add your answer

Q1. Lazy loading in react
Add your answer
Q2. Cache bursting
Add your answer
Q3. Difference between == and ===
Add your answer